It appears the selenium lightmeter works.
Here is the proof, fresh from the first roll of xp2 to come back from Westend Cameras. There is a little lens flare apparent in some of the images so I have sourced a metal lens hood on ebay which could help although I have a horrible feeling that it could even be an issue with one of the shutter curtains.
I seem to be over exposing a bit. I’ll keep running with the results of the meter for now but it could be that some intervention is in order, back off a stop maybe?